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Analog Devices Inc./Maxim Integrated MAX6719UTVDD3
- Part No.:
- MAX6719UTVDD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719UTVDD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,899
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Product details
Overview
MAX6719UTVDD3 from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds of 4.625V and 3.075V, 210ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in multivoltage telecom and portable equipment for reliable power-on reset and brownout detection.
For engineers reviewing the MAX6719UTVDD3 datasheet, MAX6719UTVDD3 pinout, MAX6719UTVDD3 application, or MAX6719UTVDD3 equivalent, this page delivers verified electrical specs, dual-supply threshold behavior, RSTIN-adjustable monitoring capability, watchdog-free configuration, and SOT23-6 layout-critical pin mapping - all confirmed from Maxim's official MAX6715–MAX6729 family documentation.
Technical Context
The MAX6719UTVDD3 implements dual independent voltage comparators for VCC1 and VCC2, plus a dedicated high-impedance RSTIN input referenced to a 626.5mV internal bandgap, enabling precise external resistor-divider-based monitoring of a third supply as low as 0.62V. Reset assertion is latched and held for a fixed 210ms timeout after all monitored voltages recover.
No watchdog timer or power-fail comparator is enabled in this variant (per Selector Guide: MAX6719 includes manual reset and RSTIN but excludes WDI and PFI/PFO). The device uses push-pull RST output referenced to VCC1 and features 50kΩ internal MR pullup, 20ns MR-to-reset delay, and immunity to VCC transients ≤100ns at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (typ), factory-trimmed - ensures reliable reset assertion when primary 5V rail drops below safe µP operating level |
| VCC2 Threshold | 3.075V (typ), factory-trimmed - monitors secondary 3.3V supply with ±1.5% tolerance over -40°C to +85°C |
| RSTIN Threshold | 626.5mV (typ), internal reference - enables third-supply monitoring down to 0.62V via external resistor divider |
| Reset Timeout | 210ms (min) - guarantees sufficient hold time for full system initialization after power recovery |
| Supply Current | 14µA (typ) at 3.6V - ultra-low quiescent draw critical for battery-operated systems |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom environments without derating |
| Reset Output Type | Push-pull active-low RST - eliminates need for external pullup; drives directly into µP reset pin |
Pinout & Package
MAX6719UTVDD3 is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, with gull-wing leads and thermal pad not present. Pin 1 is marked by dot; pin numbering follows standard SOT23 counterclockwise from mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low on any fault and holds for 210ms |
| 2 | GND | Analog/digital ground reference for all comparators, timers, and I/O; must be low-impedance |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; 1µs minimum pulse width required |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | RSTIN | High-Z adjustable monitor input; triggers reset when voltage falls below 626.5mV internal reference |
| 6 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core, sets RST output reference, and enables VCC1 comparator |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage monitoring | VCC1 = 4.625V, VCC2 = 3.075V - eliminates external resistor networks and calibration for two-rail systems |
| Adjustable third-supply monitor (RSTIN) | 626.5mV internal reference with ±25nA input current - supports <1µA divider current for battery longevity |
| Guaranteed reset validity to 0.8V | Functional reset assertion even when VCC1 or VCC2 sags to 0.8V - prevents spurious release during brownout recovery |
| Push-pull RST output | Drives µP reset pin directly without external pullup; VOL ≤ 0.4V at 3.2mA sink - compatible with 1.8V–5V logic |
| Low-glitch immunity | Rejects VCC transients ≤100ns at 100mV overdrive - avoids false resets in noisy power environments |
Applications
| Telecom Line Card Power Sequencing | Industrial PLC Dual-Rail Monitoring |
|---|---|
|
Use Scenario: Monitors +5V (VCC1) and +3.3V (VCC2) rails on a line card while using RSTIN to track a +1.2V FPGA core supply via resistor divider. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting active-low RST until all three rails stabilize above thresholds and hold for 210ms. Use Value: Prevents FPGA configuration corruption by ensuring all supplies meet timing margins before release. |
Use Scenario: Embedded controller board with 24V DC-DC converted to +5V (VCC1) and +3.3V (VCC2), where RSTIN monitors isolated +15V analog sensor supply. IC Role / Device Role / Timing Role: Fault-detection hub generating synchronized reset pulse across µP, ADC, and I/O drivers upon any rail undervoltage. Use Value: Eliminates need for three discrete supervisors - reduces BOM count, PCB area, and startup timing skew. |
| Portable Medical Device Boot Integrity | Network Switch ASIC Initialization |
|
Use Scenario: Battery-powered ultrasound probe using Li-ion (3.0–4.2V) regulated to +3.3V (VCC2) and +1.8V (RSTIN-derived), with VCC1 tied to backup coin cell (3.0V). IC Role / Device Role / Timing Role: Ensures ASIC and memory initialize only after stable 3.3V and 1.8V are confirmed, with 210ms hold time for firmware load. Use Value: 14µA typical supply current extends battery life; 0.8V reset validity guards against deep discharge-induced reset loss. |
Use Scenario: High-density switch ASIC requiring strict sequencing: +1.2V core (RSTIN), +2.5V I/O (VCC2), and +3.3V management rail (VCC1). IC Role / Device Role / Timing Role: Single-chip triple-monitor replaces discrete RC+comparator solutions, delivering deterministic 210ms reset pulse to ASIC reset pin. Use Value: Push-pull RST drives ASIC reset directly; no external components needed - improves layout reliability and EMI margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTVDD3 | Same pinout, identical VCC1/VCC2 thresholds and 210ms timeout, but uses open-drain RST output requiring external pullup. | Suitable where µP reset pin tolerates open-drain drive or where level-shifting is needed. | Select MAX6720UTVDD3 only if external pullup is acceptable and push-pull drive is unnecessary. |
| TPS3808G33DBVR | Single-supply (3.3V only), no RSTIN input, 200ms timeout, 1.6µA supply current - lacks triple-monitoring capability. | Limited to single-rail systems; cannot replace MAX6719UTVDD3 in dual/three-rail designs without redesign. | Choose TPS3808G33DBVR only for cost-sensitive, single-supply applications where RSTIN functionality is unused. |
Compared with MAX6720UTVDD3, the MAX6719UTVDD3 provides direct push-pull drive eliminating pullup resistors and reducing component count; versus TPS3808G33DBVR, it adds essential third-supply monitoring and dual-threshold supervision - making it irreplaceable in multivoltage embedded systems requiring guaranteed boot integrity.
Availability
MAX6719UTVDD3 is available at Aetrix Electronics and suitable for telecom line cards, industrial PLCs, portable medical devices, network switches, and battery-operated instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6719UTVDD3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in precision analog, mixed-signal, and power-management ICs for industrial, automotive, communications, and computing markets.
The MAX6715–MAX6729 family was designed specifically for space-constrained, multivoltage systems needing reliable, low-power, factory-trimmed supervision - targeting applications where discrete solutions increase risk and footprint.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6719UTVDD3?
The MAX6719UTVDD3 has factory-trimmed reset thresholds of 4.625V (VCC1) and 3.075V (VCC2), both specified at typical conditions and guaranteed over -40°C to +85°C. These values correspond to the "T" and "S" suffix codes in Maxim's Reset Voltage Threshold Suffix Guide, confirming the part number MAX6719UTVDD3 maps precisely to these dual thresholds.
Does the MAX6719UTVDD3 include a watchdog timer or power-fail functionality?
No, the MAX6719UTVDD3 does not include watchdog timer (WDI) or power-fail input/output (PFI/PFO) functionality. Per Maxim's official Selector Guide, MAX6719 variants support manual reset (MR) and adjustable RSTIN monitoring only - WDI and PFI/PFO are exclusive to MAX6721–MAX6729 subfamilies. This makes MAX6719UTVDD3 ideal for simpler, cost-optimized triple-supply supervision without added complexity.
What is the function of the RSTIN pin on the MAX6719UTVDD3, and what voltage range can it monitor?
The RSTIN pin on the MAX6719UTVDD3 is a high-impedance input referenced to a 626.5mV internal bandgap voltage; it asserts reset when the applied voltage falls below this threshold. Using an external resistor divider, it can monitor supply voltages from 0.62V up to the VCC1 rail - enabling precise third-supply supervision without trimming resistors. Input bias current is ±25nA, allowing megaohm-level dividers for minimal power draw.
Is the reset output of the MAX6719UTVDD3 push-pull or open-drain, and what are its drive capabilities?
The MAX6719UTVDD3 features a push-pull active-low RST output referenced to VCC1. It guarantees VOL ≤ 0.4V at 3.2mA sink current when VCC1 ≥ 4.5V, and VOH ≥ 0.8 × VCC1 when sourcing 800µA. This eliminates the need for an external pullup resistor and allows direct interfacing with µP reset pins across 1.8V–5V logic families - a key differentiator from open-drain variants like MAX6720UTVDD3.
What is the guaranteed minimum reset timeout period for the MAX6719UTVDD3, and how is it set?
The MAX6719UTVDD3 has a guaranteed minimum reset timeout period of 210ms, set by the "D3" suffix in its part number per Maxim's Reset Timeout Period Suffix Guide. This fixed timeout begins when any monitored supply (VCC1, VCC2, or RSTIN) recovers above its threshold and ensures the reset signal remains asserted long enough for complete system initialization - independent of temperature or supply variation.
MAX6719UTVDD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 0.788V, 1.575V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6719UTVDD3 FAQ
1.How can I place an order for MAX6719UTVDD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTVDD3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6719UTVDD3 reliable?
The price and inventory of MAX6719UTVDD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTVDD3 is usually 5 days.
3.What payment methods are accepted for MAX6719UTVDD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTVDD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719UTVDD3?
MAX6719UTVDD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTVDD3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6719UTVDD3?
For technical support, including MAX6719UTVDD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTVDD3 requirements.
6.How does Aetrix verify that MAX6719UTVDD3 is sourced from the original manufacturer or authorized distributors?
All MAX6719UTVDD3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6719UTVDD3 meets industry standards.
7.What is the process for return or replacement of MAX6719UTVDD3?
All MAX6719UTVDD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTVDD3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6719UTVDD3 part is unused and in its original packaging.
Return procedure for MAX6719UTVDD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6719UTVDD3 Tags
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MIC826SYMT-TR
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